diff --git a/linux/t_downgradetest.sh b/linux/t_downgradetest.sh
new file mode 100755
index 0000000..d8edfd7
--- /dev/null
+++ b/linux/t_downgradetest.sh
@@ -0,0 +1,78 @@
+#!/bin/sh -e
+# 
+# 2009      Nico Schottelius (nico-nsbin at schottelius.org)
+# 
+# This file is part of nsbin.
+#
+# nsbin is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# nsbin is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with nsbin. If not, see <http://www.gnu.org/licenses/>.
+#
+
+# Idea:
+#
+# Test different official kernels, begin with latest, skip rcs
+#
+parallel="-j32"
+
+#
+# Standard variables (stolen from cconf)
+#
+__pwd="$(pwd -P)"
+__mydir="${0%/*}"; __abs_mydir="$(cd "$__mydir" && pwd -P)"
+__myname=${0##*/}; __abs_myname="$__abs_mydir/$__myname"
+
+
+marker="${__pwd}/.${__myname}.marker"
+
+if [ -f "$marker" ]; then
+   oldversion="$(cat $marker)"
+   version="$(git tag | grep -B 1 "$oldversion" | head -n1)"
+else
+   version="$(git tag | tail -n1)"
+fi
+
+echo "Building $version"
+echo "$version" > "$marker"
+
+git checkout -b "${__myname}-${version}" ${version}
+
+# build kernel
+make $parallel clean
+make $parallel defconfig
+#cat /boot/config-2.6.26-2-amd64 >> .config
+
+cat << eof
+CONFIG_BNX2=y
+CONFIG_SCSI=y
+CONFIG_SCSI_DMA=y
+CONFIG_SCSI_PROC_FS=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_BLK_DEV_SR=y
+CONFIG_CHR_DEV_SG=y
+CONFIG_SCSI_MPT2SAS=y
+CONFIG_XFS_FS=y
+CONFIG_EXT3_FS=y
+eof
+>> .config
+
+make $parallel all
+
+# install kernel
+make $parallel install modules_install
+
+# copy kernel image
+cp "arch/x86/boot/bzImage" "/boot/${__myname}"
+#update-initramfs -c -k "$version"
+
+# reboot
+#reboot